
pacemaker & Extrasystole
Authored by sara Ashour
Other
University
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9 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Artificial pacemaker must be used when the heart depends on:
AVN rythm
primary pacemaker cells
Purkinje fibers rythm
beats with 60 b/min
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The shown picture may represent AP of all the following except:
conductive cardiac muscles
SAN
main atrial and ventricular bulks
specialized cardiac muscles
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
if the waves on the left represents normal cardiac muscle contractions, the shown effect on the right may be caused by:
local application of beta blockers
local application of adrenaline
fever
thyrotoxicosis
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In patients receiving atropine, you expect their HR to be:
70-75 bpm
90-110 bpm
30-40 bpm
120 bpm
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
the shown picture represents :
ventricular ectopic focus
atrial ectopic focus
atrial fibrillation
AV nodal rythm
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
which of the following is caused by accumulation of Ca ions from the missed beat ?
extrasystole
compensatory pause
premature beat
post extrasystole potentiation
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
causes of extrasystole may involve all of the following except:
thyrotoxicosis
receiving digitalis
sleep deprivation
excess coffee intake
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